<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>跳动爱心</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        body {
            background-color: pink;
        }

        #frame {
            position: relative;
            width: 400px;
            height: 300px;
            margin: 250px auto;
        }

        .left,
        .right {
            top: 0;
            width: 200px;
            height: 200px;
            border-radius: 50%;
        }

        .left {
            left: 35px;
        }

        .right {
            right: 35px;
            z-index: -1;
        }

        .bottom {
            bottom: 36px;
            left: 100px;
            width: 200px;
            height: 200px;
            transform: rotate(45deg);
            z-index: -1;
        }

        .heart {
            position: absolute;
            box-shadow: 0 0 40px #d5093c;
            animation: beat .8s ease infinite normal;
            background: linear-gradient(-90deg, #F50A45 0%, #d5093c 40%);
        }

        @keyframes beat {
            0% {
                transform: scale(1) rotate(225deg);
                box-shadow: 0 0 40px #d5093c;
            }

            50% {
                transform: scale(1.1) rotate(225deg);
                box-shadow: 0 0 70px #d5093c;
            }

            100% {
                transform: scale(1) rotate(225deg);
                box-shadow: 0 0 40px #d5093c;
            }
        }
    </style>
</head>

<body>
    <div id="frame">
        <div class="heart left"></div>
        <div class="heart right"></div>
        <div class="heart bottom"></div>
    </div>
</body>

</html>